From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C0D62C55192 for ; Thu, 23 Apr 2020 13:59:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AB2652098B for ; Thu, 23 Apr 2020 13:59:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728670AbgDWN7m (ORCPT ); Thu, 23 Apr 2020 09:59:42 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:2846 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728647AbgDWN7i (ORCPT ); Thu, 23 Apr 2020 09:59:38 -0400 Received: from DGGEMS410-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id A941C624DFAC58D63055; Thu, 23 Apr 2020 21:59:36 +0800 (CST) Received: from DESKTOP-KKJBAGG.china.huawei.com (10.173.220.25) by DGGEMS410-HUB.china.huawei.com (10.3.19.210) with Microsoft SMTP Server id 14.3.487.0; Thu, 23 Apr 2020 21:59:27 +0800 From: Zhenyu Ye To: , , , , , , , , , , , , , , , , CC: , , , , , , , , , Subject: [PATCH v2 5/6] mm: tlb: Provide flush_*_tlb_range wrappers Date: Thu, 23 Apr 2020 21:56:55 +0800 Message-ID: <20200423135656.2712-6-yezhenyu2@huawei.com> X-Mailer: git-send-email 2.22.0.windows.1 In-Reply-To: <20200423135656.2712-1-yezhenyu2@huawei.com> References: <20200423135656.2712-1-yezhenyu2@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.173.220.25] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch provides flush_{pte|pmd|pud|p4d}_tlb_range() in generic code, which are expressed through the mmu_gather APIs. These interface set tlb->cleared_* and finally call tlb_flush(), so we can do the tlb invalidation according to the information in struct mmu_gather. Signed-off-by: Zhenyu Ye --- include/asm-generic/pgtable.h | 12 ++++++++++-- mm/pgtable-generic.c | 22 ++++++++++++++++++++++ 2 files changed, 32 insertions(+), 2 deletions(-) diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h index 329b8c8ca703..8c92122ded9b 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -1161,11 +1161,19 @@ static inline int pmd_free_pte_page(pmd_t *pmd, unsigned long addr) * invalidate the entire TLB which is not desitable. * e.g. see arch/arc: flush_pmd_tlb_range */ -#define flush_pmd_tlb_range(vma, addr, end) flush_tlb_range(vma, addr, end) -#define flush_pud_tlb_range(vma, addr, end) flush_tlb_range(vma, addr, end) +extern void flush_pte_tlb_range(struct vm_area_struct *vma, + unsigned long addr, unsigned long end); +extern void flush_pmd_tlb_range(struct vm_area_struct *vma, + unsigned long addr, unsigned long end); +extern void flush_pud_tlb_range(struct vm_area_struct *vma, + unsigned long addr, unsigned long end); +extern void flush_p4d_tlb_range(struct vm_area_struct *vma, + unsigned long addr, unsigned long end); #else +#define flush_pte_tlb_range(vma, addr, end) BUILD_BUG() #define flush_pmd_tlb_range(vma, addr, end) BUILD_BUG() #define flush_pud_tlb_range(vma, addr, end) BUILD_BUG() +#define flush_p4d_tlb_range(vma, addr, end) BUILD_BUG() #endif #endif diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c index 3d7c01e76efc..3eff199d3507 100644 --- a/mm/pgtable-generic.c +++ b/mm/pgtable-generic.c @@ -101,6 +101,28 @@ pte_t ptep_clear_flush(struct vm_area_struct *vma, unsigned long address, #ifdef CONFIG_TRANSPARENT_HUGEPAGE +#ifndef __HAVE_ARCH_FLUSH_PMD_TLB_RANGE + +#define FLUSH_Pxx_TLB_RANGE(_pxx) \ +void flush_##_pxx##_tlb_range(struct vm_area_struct *vma, \ + unsigned long addr, unsigned long end) \ +{ \ + struct mmu_gather tlb; \ + \ + tlb_gather_mmu(&tlb, vma->vm_mm, addr, end); \ + tlb_start_vma(&tlb, vma); \ + tlb_flush_##_pxx##_range(&tlb, addr, end - addr); \ + tlb_end_vma(&tlb, vma); \ + tlb_finish_mmu(&tlb, addr, end); \ +} + +FLUSH_Pxx_TLB_RANGE(pte) +FLUSH_Pxx_TLB_RANGE(pmd) +FLUSH_Pxx_TLB_RANGE(pud) +FLUSH_Pxx_TLB_RANGE(p4d) + +#endif /* __HAVE_ARCH_FLUSH_PMD_TLB_RANGE */ + #ifndef __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS int pmdp_set_access_flags(struct vm_area_struct *vma, unsigned long address, pmd_t *pmdp, -- 2.19.1